Which of the following structures is a branched-chain hydrocarbon? 
Definitions:
Negative Reinforcement
A behavior reinforcement strategy where the removal of an undesirable or aversive stimulus strengthens or increases the likelihood of a behavior.
Positive Reinforcement
The process of increasing the probability of a behavior by following it with a desirable event or outcome.
Likelihood
The probability or chance of an event occurring.
Punishment
A consequence that decreases the likelihood that a behavior will occur.
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