At the initial examination in the Framingham study, coronary heart disease was found in 5 per 1,000 men aged 30yrs to 44yrs and in 5 per 1,000 women aged 30yrs to 44yrs. The inference that in this age group men and women have an equal risk of developing coronary heart disease is

A. Correct
B. Incorrect because of a failure to distinguish between incidence and prevalence
C. Incorrect because a proportionate ratio is used when a rate is required to support the inference
D. Incorrect because of failure to recognize a possible cohort phenomenon
E. Incorrect because there is no control or comparison group