Which of the following is true of Jean Blondel’s book “The Presidential Republic”?

In his 2015 book The Presidential Republic: Executive Office in Comparative Perspective, Jean Blondel presents a systematic comparative analysis of presidential republics across the globe, examining how presidential executives operate not only in the United States but across Latin America, Africa, and the post-Soviet republics, making both (A) and (R) true with (R) explaining (A).