Answer:
The correct option is A) a regulated process that involves controlling the amount of proteins produced by a gene.
Step-by-step explanation:
Gene expression can be described as a process in which certain mechanisms occur to increase, decrease or stop the production of proteins by a specific gene. Gene expression is also termed as gene regulation. This phenomenon is very important as an organism's body requires specific amounts of proteins. Higher or lower amounts can be toxic for the body. So to carefully control the production of a gene product, gene regulation or gene expression is necessary.