With Texas (at the time) being a country, and problems with Mexico were arising, annexation was highly talked about. With the U.S. experiencing something like this before hand (with England), it could only mean that the U.S.A could have healthy reason to help Texas. Thus, making D the best answer.
When Reagan was referring to freedom he used repetition language as a rhetorical device. Repetition language means same words or phrases are using again and again in the paragraph. The repeated words are used to make someone's idea stronger and make it unforgettable.
