The chloroplast
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I am pretty sure that the actual answer hides in the question itself, therefore I'd choose the second option. According to the phrase "he more successful of the two", it definitely should be B. Competition.
RNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. Translation reads the genetic code in mRNA and makes a protein. Transcription is the first part of the central dogma of molecular biology: DNA → RNA. It is the transfer of genetic instructions in DNA to messenger RNA (mRNA).
Catalysts are called enzymes it's very important in biology (like what you are doing) A catalyst<span> is something that works by providing an alternative reaction pathway to the reaction product.
Hope this helps you! :)</span>