A thesis statement A. is a summary of the text.
B .should be somewhat general.
C .must be supported by evidence.
D. is a known fact.​

A.is a summary of the text.

Explanation:

The purpose of a thesis statement is to highlight the main issue that is being discussed in your paper or essay. It is usually a one complete sentence that establishes your whole point of argument.

It can be understood as a statement that summarizes the whole text as its main purpose is to develop an insight of what your paper or essay is all about.

Therefore, it can be said that a thesis statement is a summary of the text.

both the address and the poster use diction to convey their message. diction is defined as a style of writing or speaking based on the types of words chosen in order to send a message. parallelism is when a similar sentence structure is used for several sentences on a text; roosevelt's address doesn't follow that. repetition has to do with repeating a word or sentence in order to emphasize and idea, however neither the poster nor the address use repetion. finally, the address doesn't use images to convey a message.