Harper Hospital treated 423 patients last week who were children, out of a total of 931 patients. The administrator calculates that they had 408 adult patients. Is the administrator's calculation reasonable? Estimate the number of adult patients by rounding the numbers to check the administrator's calculation. A) The administrator's calculation is reasonable because my estimate of 500 is fairly close to 408. B) The administrator's calculation is reasonable because my estimate of 400 is fairly close to 408. C) The administrator's calculation is not reasonable because my estimate of 500 is not close to 408. D) The administrator's calculation is not reasonable because my estimate of 400 is not close to 408.