Imagine That You Want to Paraphrase the Findings from a Research

Imagine that you want to paraphrase the findings from a research project published by Glenn Simpson and Dawn Hager in 1989 titled "The Role of Crackle Crunch Cereal as a Cognitive Enhancer" - which of the following in-text citations would be correct according to APA style?

A) Simpson, G. and Hager, D. 1989) . found that eating Crackle Crunch cereal was directly related to higher exam scores, but these effects dissipated after 2 hours.
B) Simpson, G. and Hager, D 1989) . found that eating Crackle Crunch cereal was directly related to higher exam scores, but these effects dissipated after 2 hours p. 88) .
C) Eating Crackle Crunch cereal has been found to enhance exam scores at least in the short-term Simpson & Hager, 1989) .
D) Eating Crackle Crunch cereal has been found to enhance exam scores at least in the short-term Simpson, G. & Hager, D., 1989) .