Since the founding of the united states, sentences used in presidential speeches have gradually

become much shorter
grown increasingly complex
started to include more old words
incorporated more latin words

The correct answer is A. Become much shorter

Explanation:

Presidential speeches are official speeches or presentations delivered by the elected President of a country to the citizens that serve for multiple purposes inaugural speeches, important messages during crisis or speeches addressing a specific issue. In the case of the Presidential speeches in the U.S., the number of words and complexity of sentences has evolved through the history and in the last centuries presidents mainly use shorter speeches of less than ten minutes in which they communicate the main message to the audience by choosing carefully the words to be including. This means the sentences in Presidential speeches are now shorter as they aim at communicating the main message in a simple, concise but convincing way that can be understood by all the audience. Thus, it can be concluded since the founding of the United States, sentences in presidential speeches have gradually become much shorter.

the president was the speaker and it was a great part of history.

explanation:

video of the national aeronautic space administration's (nasa) coverage of president john f. kennedy’s address at rice university, houston, texas, concerning the nation's efforts in space exploration. in his speech the president discusses the necessity for the united states to become an international leader in space exploration and famously states, "we choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard."

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."