Which details develop the central idea that the king has
kept Egypt safe? Select all that apply.

The king provided cavalry and infantry
The king gave money and grain to keep people
safe
The king and his children will king keep the kingship
forever
The king provided ships to guard the sea.

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)

in the following paragraph, the fourth sentence the correct answer is: three personal subject pronouns

”she was embarrassed when she found that they had been put back on the shelves…”

a   subject pronoun is a personal pronoun. i, you, he, she it, we, they.  

in the sentence it can be observed she, used twice and they used once. is for this reason that is a three personal subject pronoun sentence.