Final answer:
The beneficiary received $50,000 from the life insurance policy due to the double indemnity provision that doubled the original amount of $25,000.
Step-by-step explanation:
The student has asked what amount the policy beneficiary received from a life insurance policy with a double indemnity provision, when the insured died of a heart attack.
Under a double indemnity provision, the benefit paid out upon the insured's death due to an accident or specified events, such as a heart attack, is doubled. In this case, since the original policy was worth $25,000, the presence of the double indemnity provision would result in the payment being doubled to $50,000. Therefore, the correct answer is B) $50,000.