Answer:
The correct answer is C production of FAD to FADH2 by the citric acid cycle represent the energetic capacity to synthesize about 1.5 ATP.
Explanation:
Citric acid cycle is one of most important stage of cellular respiration.Citric acid cycle or TCA  cycle composed of various enzyme catalyzed biochemical reaction.
  various reduced coenzymes are produced during TCA cycle such as NADH,FADH2.FADH2 is formed from FAD during the conversion of succinate to fumarate.
   The FADH2 then enter electron transport chain to oxidize itself into FAD along with the generation of 1.5 ATP.
 
        
             
        
        
        
The scientific method's foundation is best described as "the process of hypothesis and testing through which scientific inquiry happens." Thus, the correct option is D.
<h3>
What is scientific method?</h3>
The scientific method is a set of actions that are followed in order to develop scientific knowledge.
The scientific process includes the following steps:
- To make observations on a particular natural occurrence and then generate questions based on those observations.
- To answer these questions, you must propose a credible explanation (i.e., a hypothesis).
- To put the working hypothesis to the test using experimental and/or observational methods.
- To gather information in order to confirm or refute a working theory.
- Analyze the findings and develop conclusions.
For more information regarding scientific method, visit:
brainly.com/question/17216882
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1. Plastic is made of natural chemicals and is used for multiple things, such as culinary sets and water bottles 
2. Metals are found in mines, and are used for currency and engineering