Which of these is the correct function of Traceview?

Which of these is the correct function of Traceview?
A . Displays a graphical task execution log.
B . Displays graphically a memory acquisition and release log
C . Displays graphically the call stack.
D . Displays graphically the Ul state hierarchy.

Answer: A

Explanation:

Traceview is a graphical viewer for execution logs saved by your application. Traceview can help you debug your application and profile its performance.

References: http://developer.android.com/tools/help/traceview.html