Consider the returns on four investment options: A, B, C, and D. All four investment options require the same principal amount, and the returns on the investments are considered over the same time frame. The present value of the return on investment A is greater than the present value of the return on investment B, which is greater than the present value of the return on investment C. The present value of the return on investment D is the lowest. A rational investor will choose to invest in:

Skychefs, inc. prepares in-flight meals for a number of major airlines. one of the company's products is grilled salmon in dill sauce with baby new potatoes and spring vegetables. during the most recent week, the company prepared 4000 of these meals using 960 direct labor hours. the company paid these direct labor workers a total of $19,200 for this work, or $20.00 per hour. according to standard cost card for this meal, it should require 0.25 direct labour-hours at a cost of $19.75 per hour.1. what is the standard labor-hours allowed (sh) to prepare 4,000 meals? 2. what is the standard labor cost allowed (sh x sr) to prepare 4,000 meals? 3. what is the labor spending variance? 4. what is the labor rate variance and the labor efficiency variance?