C) RNA<span> carries the code from DNA in the nucleus to the ribosome for protein synthesis.
The ribosomes are in the cytosol/cytoplasm, but DNA is in the nucleus. DNA is too large to travel out of the nucleus, so it needs the help of mRNA to transfer the genetic code to the ribosome, which translates the code into a protein. That means A, B, and D cannot be true. </span>
Random changes in allele frequency in a population are usually called genetic drift. The reason why this is the answer is because it is a very specific word which is used to describe exactly that - random changes in allele frequency.
All the other cases; answers, here aren't correct and don't apply.
The neck is the Cervicis.
Hope this helps