This should be B, it is a compound-complex sentence.
The answer is A. of a lower temperature
i bet u ready know the answer
Unmake is indeed a word. It is a verb meaning to reverse, or undo the making of. Synonyms include to ruin or destroy.
The use of these words, unmake and sensible, together is uncommon. A better phrase to use would be: "to confuse," "to ignore," or to "be unreasonable, 'depending on the usage.
In any case someone says someone else doesn't have what it takes, it usually is meant in a negative way, sometimes not however. By saying this, you are claiming that another person does not have the full potential or capability to successfully accomplish a certain task. This is what he most likely meant to Percy, however in other cases it may be meant in a way to be neutral, though the speaker may not realize it's negative effect. This is not fair or just criticsm, because he does not know about Percy's experiences or weaknesses, or let alone his strong potential. He judges without thinking and doesn't realize the talent and importance he holds as a character.