Answer:
The most fundamental element of the Gothic style of architecture is the pointed arch, which was likely borrowed from Islamic architecture that would have been seen in Spain at this time. The pointed arch relieved some of the thrust, and therefore, the stress on other structural elements.
Explanation:
A contract is an agreement, usually written out on a legal document, in which it states terms and agreements, as well as rewards that would be given at the end when the terms are met.
For example, a contract for assassination may be posted out in the black market. An assassin would then agree to take on the requirement of the contract. If it is met, the payment would be given to the assassin. If not, then the contract becomes void. This makes contracts important because the terms and everything is written down, and can be looked on for future references.
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D. 1800s because that's when Cuba, Puerto Rico and Mexico gained independence