Which activity can be used to modify the value of an existing cell in a datatable

The name of the activity is "Add Data Column".

Explanation:

Add data column activity is a part of the database that is used in used for adding a column in the database table. This activity also used in Windows.  

answer(a) occurs after your prediction;

given the lack of choices, i'm gonna wing it and say that pushing your car off a cliff might not be the best idea. your car might sustain damage from the fall and will probably result in the car being too damaged to jump start.

if that's not good enough, avoid filling the car with bees. bees might get agitated when trapped or during the moving process, and might result in death or painful stings that will make jump starting your car very difficult. but in the event that you do choose to fill your car with bees, remember to wear protective gear!