Answer:d. Mr. Washington made a pledge to the community.
Explanation:
Explicit evidence is a claim or statement that is stated directly and can be found/ taken from the sentence. It is easy to know for it is a direct statement from the passage.
As stated in the given passage, "Mr. Washington made a pledge to the community last year that, as the new principal, he would do everything in his power to improve the nutritional value of school lunches." This is explicit evidence as it is directly taken from the provided passage while the other options are not. They are just assumptions or ideas that can be taken from the passage but are not directly stated.
Thus, the correct answer is option d.