Since there is a divergence in the pronoun reference between 'it' and 'its', all choices containing 'its' are grammatically wrong. This leaves us with only B and C.
The colon is required to portray the two features stated in the earlier clause and B does it adequately, although in a passive voice. C can be faulted for the disconnect of the second clause after 'and' from the core theme of the topic.
The colon is required to portray the two features stated in the earlier clause and B does it adequately, although in a passive voice. C can be faulted for the disconnect of the second clause after 'and' from the core theme of the topic.
