The main clause is "Chris's chief interest was tennis".
The subordinate clause is "Which he was just learning to play" and it is an adjective clause because it describes what the "tennis" was like. Tennis is an object and this subordinate clause further describes that it is the tennis that he was trying to learn.
Answer:
A rebellion against the Nazi occupation in Amsterdam and personal guilt over her encouragement for her love to join the war effort, who passed.
Not cry? we're on the threshold of death soon we shall be inside so it is (B)
