B is your answer
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Olmec and Mayan culture both had pyramids as an important part of their cultures. La Venta was an Olmec pyramid built as a ceremonial center. <span>Pyramid of Kukulkan, is a Mayan pyramid and is one of the most visited pyramids to date.</span>
Answer: When they sign a yellow- dog contract they are agreeing to the company which forces each individual worker to sign, on the penalty of not getting the job (or if he already has the job, of losing it), binding the worker to surrender his right to organize. In other words, yellow dog binds the worker not to join a union.