These _________ are the __________," said the treasurer.

conclusions presidents
conclusion's president's
conclusions presidents'
conclusions president's

conclusions president's

To determine the correct form of the blank spaces in the sentence, we need to consider the possessive form of the word "conclusion" and the plural form of the word "president."

When we want to show possession with a singular noun, we use an apostrophe + s ('s). So, if we want to say "the conclusion of the president," the correct form would be "conclusion's president."

On the other hand, when we want to show possession with a plural noun ending in "s," we use just an apostrophe ('). So, if we want to say "the conclusions of the presidents," the correct form would be "conclusions presidents'."

Looking at the given sentence, the treasurer says, "These conclusions are the president's." Therefore, the correct form of the blanks is: conclusions president's.