The answer should be D. Here are a few references I used.
Website with information: https://study.com/academy/lesson/myocardium-definition-function.html#/transcriptHeader
You can always ask Google, your best friend :)
Answer:
<h3>The implication of this work is that efficacy has to be defined by at least two equilibrium constants (or, more generally, by four rate constants). The combined influences of affinity and efficacy determine how effectively a drug will produce a biological effect, a property known as potency.</h3>
Professionals would recommend exercise as the best way to deal with distress.
The answer is C, clay and plastic.