What does the word basic block mean?

basic block- (Noun). A sequence of contiguous instructions that contains no jumps or labels.

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In compiler construction, a basic block is a straight-line code sequence with no branches in except to the entry and no branches out except at the exit. This restricted form makes a basic block highly amenable to analysis.

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mark twain, real name samuel langhorne clemens, was an american writer, humorist, entrepreneur, publisher, and lecturer. among his novels are the adventures of tom sawyer and its sequel, the adventures of huckleberry finn, the latter often called "the great american novel". wikipedia

i believe that the correct answer is (d) the struggle between tradition and change.

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