Your answers would be C, E, H, I
When I was afraid is the subordinate clause because "that is the time" can stand by itself and can be recognized as a independent clause. I believe that the subordinate clause would fall under the adjective clause family, mainly because "when I was afraid" directly refers to "time", which is a noun.
I think in my opinion Yes
A predicate is a part of the sentence that contains a verb and stating something about the subject in the sentence. In this sentence it is the word "was" because it describes nursing and is a verb