The content dimension of a conflict relates to what? a. the acceptability of the outcome of the conflict b. the implications of the conflict for the relationship c. the strategies people use to manage the conflict d. the specific point of contention giving rise to the conflict

I believe the answer is: D. The specific point of contention giving rise to the conflict

In this context, content dimension refers to the general concept to analyze multiple variants that could cause  a certain situation to happen.
In conflict, the variants could include things such as socio economic situation, personalities, the external behaviour of other people, etc.