Elaine and Jerry married when they were both 66 years old. Jerry already had a straight life annuity that provided him with a comfortable level of income, which he was quite willing to use to help support Elaine. However, he was concerned about what would happen to Elaine's income when he died. Together, they had another $150,000 available for investment. Which of the following options would provide Elaine with the most lasting, secure and lucrative income? Question 15 options: a) a joint and last survivor annuity b) a pure deferred term certain annuity set to commence in 5 years c) a survivorship annuity d) a short-term guaranteed investment