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Which statement will generate a random number between -1 and 4 (inclusive), given this statement which generates a random floating point number between 0 and 1? double r = rand() * 1.0 / RAND_MAX; // Between 0 and 1

a. double x = -1 + 2 * r;
b. double x = -1 + 3 * r;
c. double x = -1 + 4 * r;
d. double x = -1 + 5 * r;

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