Counter-premise: Crab fishing is not considered a sport by many laypeople.
Premise: But because crab cages are extremely heavy, crab fishermen must be very strong to do their work.
Conclusion: For this reason, crab fishing is a sport.
Which of the following is an assumption that supports concluding above for from the reason given for that conclusion.

OPTION A - INCORRECT
This option only initiated a backward logic for us, and its expression does not give a reason for the conclusion.

OPTION B - INCORRECT
We were asked specifically, to determine the amount of energy of strength needed for crab fishing in comparison to other types of fishing. This option definitely goes way far off point. Incorrect option.

OPTION C - INCORRECT
The question does not talk about any exercise the crab fishermen are exposed to; this is not the bone of contention here. This is off point and irrelevant.

OPTION D - INCORRECT
This statement could be true or not. Most importantly, it doesn't have to be true for the conclusion to hold.

OPTION E - CORRECT
This is an assumption that must be true. Otherwise, the conclusion doesn't hold. In fact, it is the sole basis supporting the conclusion. As far as an activity requires strength, it is a sport.