The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.7parts per million (ppm). A consumer health group measured the level of the chemical in a random sample of tomatoes obtained from one producer to determine whether the mean level of the chemical in these tomatoes exceeds the recommended limit.

A. H₀: =0.7ppm

H_a: >0.7ppm

B. H₀: <0.7ppm

H_a: >0.7ppm

C. H₀: =0.7ppm

H_a: 0.7ppm

D. H₀: >0.7ppm

H_a: =0.7ppm