The purchase of a new medium-sized, truck-mounted crane is being evaluated Time left 0:12:48 economic estimates for the two alternatives are as follows: Project A B Investment $20,000 $40,000 Annual savings $5000 $7500 Project's life 4 years 6 years If the study period is 12 years, and the MARR is 10%, use the repeatability assumption to decide which alternative is better. a. Choose B since its NPW is -$16840 O b. Choose B instead of A since the NPW of Ais -$4178 O c. Choose A since it saves $2555 in NPW incremental analysis d. A and B are indifferent