The most important reason for planning your dives and executing the dive per your plan is to:

a - prevent accidents
b - maintain the proper surface interval
c - ensure the dive is enjoyable
d - ensure the proper amount of gas is used

A - Prevent accidents.

Explanation:

This is the most important reason to plan dives. It is expectable to plan dives to enjoy the experience, but you can plan dives that do not need to be enjoyable, so it is not option C. Options B and D are part of having safe dives, so option A include both. The execution of a bad dive can have lasting repercussions on those how to experience it, and the most critical aim of planning a dive is to prevent accidents

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