The sentence that would be effective if inserted at the beginning of second paragraph is some people engages in compulsive gambling.
<h3>What is a
compulsive gambling?</h3>
It is also known as a gambling disorder and it refers to the uncontrollable urge to keep gambling despite the toll it takes on your life.
Any person with a compulsive gambling will have a hard time resisting or controlling the impulse to gamble because his/her brain is reacting to this impulse in the same manner it reacts to a person addicted to alcohol or drugs.
Hence, the sentence that would be effective if inserted at the beginning of second paragraph is some people engages in compulsive gambling.
Therefore, the Option B is correct.
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