Answer: Diveing
Explanation: In most words that add an -ing to it, they drop out the e and put the -ing onto the rest of the word. Here's some examples:
Make- Makeing✖ Making✓
Bake- Bakeing✖ Baking✓
Ride- Rideing✖ Riding✓
Answer:
An embargo was laid by the general on entering the arsenal.
I believe the third one is correct