Bird Species from Temperate Regions Must Cope with Relatively Short

Multiple Choice

Bird species from temperate regions must cope with relatively short breeding seasons. A study examined the relationship between blood testosterone level (ng/ml) and the duration of the egg-laying period (months) in temperate bird species. The following scatterplot displays this relationship, after taking the logarithm of each variable:
Suppose the measurements were switched so that logarithm of testosterone level was treated as an explanatory variable rather than a response variable. What impact would this switch have on the correlation?

A) The correlation would switch signs.
B) The correlation would not make sense because logarithm of egg-laying duration is the explanatory variable.
C) The correlation would have a completely different magnitude.
D) The correlation would remain unchanged.