The following graph represents two spectrophotometric calibration curves obtained at two wavelengths. Based on this information, determine whether the following statements are true (C) or false (F):
a. The analytical sensitivity is different in both curves_____
b. the S/N ratio of the standard solution response is expected to be greater than 420nm_____
c. the sensitivity of method A is less than that of method B_____
d. the detection limit of method A is expected to be less than the detection limit of method B_____
e. the determination of the concentration of the unknown cannot be carried out by both methods._____