Carbon dioxide should be the answer considering its a huge focal point in our climate today and how it affects it.
The sequence of the template DNA strand of the mRNA transcript of UGGCACUCCAG is ACCGTGAGGTC. This is from the pairing of U to A, G to C, C to G, A to T and T to U. In this case, the abbreviations refer to the nitrogen bases that are the biulding blocks of the DNA strands.
I think the answer would be A
The gene responsible affects those cats hearing. That one gene is responsible for that hearing loss