The present and the past are similarly related by the fact that you know what happened. For example you know what’s going to happen to you right now? You mostly do. Do you know what happened in the past? Yes.
Answer:
A carboxylic acid is an organic acid that contains a carboxyl group attached to an R-group.
Explanation:
hope it help✌️
#Good day
I believe B. is the answer
hope this helped