Business Rental Corporation (BRC) and Cartage Trucking Companyenter into a contract for a lease of ten hydraulic lifts. Under theperfect tender rule, BRC must ship or tender goods to the lessee thata. approximately conform to all of the details of the contract. b.entirely conform to the contract except in one or two details. c.exactly conform to the contract in every detail. d.substantially conform to the contract in most details.

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i.e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i.e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.