Which of the Following Best Explains Why the Drug-Receptor Theory

Which of the following best explains why the drug-receptor theory is often referred to as being similar to a lock and key?

A) When two or more drugs are administered,the receptor site will allow either drug to bind to the receptor despite its affinity to unlock the receptor.
B) An appropriate drug fit will produce the desired response from the drug receptor.
C) Competitive and non-competitive drugs have an equal chance of unlocking the receptor to produce its intended action.
D) The drug with a reduced affinity has an equal opportunity with a drug that has a greater affinity of unlocking the receptor.