**Core Concept**
Drugs acting through receptors exhibit specific pharmacological features due to the receptor-drug interaction. This interaction is based on the **binding affinity** of the drug to the receptor and the **intrinsic efficacy** of the drug.

**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss the general features of drugs acting through receptors. These features include **agonism**, **antagonism**, **partial agonism**, and **inverse agonism**. Drugs can exhibit **dose-response relationships** and **structure-activity relationships**.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we cannot determine why it is incorrect.
**Option B:** Similarly, without the details of option B, its incorrectness cannot be explained.
**Option C:** The same applies to option C.
**Option D:** Option D's incorrectness also cannot be discussed without its specifics.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that **receptor specificity** and **dose-response curves** are crucial in understanding how drugs interact with receptors.

**Correct Answer:** Correct Answer: D. Irreversibility is not a characteristic typically associated with most receptor-drug interactions, as most are reversible.