Answer: B. split the question into two so that it is not doubleĀbarreled
Explanation: To improve the construct validity of the question above, the question could be separated into two distinct questios in other to make it better understood and also improve its validity.
It could be rephrase as thus:
"Please indicate whether the following statement is true or false for you:
1. My cell phone is new.
2. My cell phone has all the latest features".
Thus way the question has better construct validity.