1. Based on the article which/conclusion can be made by the reader (4F)
to

the answer is a)   a sentence of death costs the state "almost three times as much as a sentence of life in prison" (delon 147)

you need to add the passage to the question.

the correct way to cite this in apa format is the following: smith, d. (2001). world environment day. retrieved from  

apa (american psychological association) style is most commonly used to cite sources within the social sciences.  

quotation styles can differ by use and by styles and every subject has its own unique style of quotation.

explanation: