(Virginia Mayo/Associated Press)

The letter was in response to one that several lawmakers, including Rep. Cliff Stearns (R-Fla.), chairman of the House subcommittee on oversight and investigations, and Rep. Henry Waxman (D-Calif.), ranking member of the House Energy and Commerce Committee, sent to Google chief executive Larry Page last week.

Google director of Public Policy Pablo Chavez said that, for signed-in users, the policy expands on provisions that allowed the company to share user account information between services, and adds in integration with a user’s Web and YouTube history.

“Some have expressed concern about whether consumers can opt out of our updated privacy policy,” Chavez wrote. “We understand the question at the heart of this concern. We believe the relevant issue is whether users have choices about how their data is collected and used.”

In answering specific questions from lawmakers, however, the company said that it is not possible to use Google services that require a log in without consenting to the information sharing practices.

“If people continue to use Google services after March 1, they’ll be doing so under the updated privacy policy,” the letter said. Users can still use some services, such as Google Search, YouTube and Maps without logging in.

The company suggested that users could set up multiple accounts to manage multiple facets of their life (work, personal, etc.) if they do not want certain information shared across services.

The company added that its decision to unify 60 of its products under one privacy policy is in line with recommendations from privacy experts around the globe, who have asked companies to craft shorter policies using simpler language.

The letter also addressed some concerns about teen privacy. The company highlighted that its services target teens with “in-product guidance” on how to protect privacy, and set defaults for privacy to “more conservative settings.” It also mentioned specific policies meant to shield teens from inappropriate contact.

For example, the letter says: “If a teenager is using the Hangouts feature...and a stranger outside of a teen’s circles joins the Handout, we temporarily remove the young adult and give him or her a chance to rejoin.”

Google declined to answer questions about whether it was planning to further integrate data from its services. “We are not prepared to make any specific product or feature announcements yet that might involve the future integration of data across products or services,” Chavez wrote.