Android Studio

Most Android layouts don't come with scrollbars to allow you to scroll down the page. To add a vertical scrollbar to your layout, you should Select one: O a. you should add android:scrollview to your layout b. surrond your existing layout with a element C. surrond your existing layout with a element d. you should add android:scrollbar to your layout O Frame layouts stack their views on top of eachother. Select one: O True O False When your app is launched, which type of activity would it be: Select one: 0 a. Category activity b. First activity c. Detail/edit activity d. Top-level activity O