What Is the Relationship Between the Rate Constant and the Half-Life

Multiple Choice

What is the relationship between the rate constant and the half-life for nuclear decay?

A) rate = kt_1/2
B) $k=\frac{\ln (0.693) }{t_{1 / 2}}$
C) k = ln (0.693t_1/2)
D) $k=\frac{\ln (2) }{t_{1 / 2}}$
E) k = 0.693t_1/2