<span> . . a <em>tenet</em> is . .<u><em> a main principle/belief, usually religious or philosophical</em></u></span>
. . thus . . main principle/belief of the New Jersey Plan was . . <u><em>to offer the idea of a single-house legislature in which each state would have an equal number of votes</em></u> . . giving smaller states an equivalent voice of power within the government compared to larger states
I believe its B as 'progressive' means <span>favoring or advocating </span>progress, change, improvement, or reform, as opposed to wishing to maintain things as they are, especially in political matters:<span>
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D. They improved conditions on slave ships to help more people survive.