Find the derivative of the function R(t) = (t + e^(t))(5 - √t). What is the value of R^'(t)?

Options:
A) R^'(t) = (5 - √t)(1 + e^(t))
B) R^'(t) = (1 + e^(t))(5 - √t)
C) R^'(t) = (t + e^(t))(5 - √t)
D) R^'(t) = (5 - √t)(t + e^(t))