Which of the following statements is true?
exercising once a week is enough to keep the body healthy.
endorphins released during exercise reduce pain and boost mood.
it is okay to try drugs a few times because it is easy to stop using them.
o carbohydrates are found in lean meats and skinless chicken.

During and after exercise our body releases a chemical called endorphin. This chemical interacts with the receptors in our brain and makes our perception of pain become reduced. Besides the reduction of pain, it also boosts mood and makes us feel energized and happy. That is why exercise helps with a lot of mental illnesses but unfortunately, many illnesses make us unmotivated to exercise regularly.

letter d is correct.

the answer is option a.