4. Nearly a million immigrants from Asia came through Angel Island's immigration center; some had to wait there a long time.
compound
complex compound-complex

the answer should be b.

explanation:

it should be b because she researched before writing so it would be in past tense. "the author researches her subject before she had written the first draft.

there is no excerpt.

put the excerpt in the comments and ill answer.

the purpose is to inform because for some reason they really want you to know about it.

hey there,

your answer is a) today we hope for clear skies.

let's look at the word(s) progressive verb. progressive means its happening right now. it is not going to happen and it has not already happened. it is happening right now. the sentence "today we hope" in option a is an example of a progressing verb. they are hoping right now. options b, c and d are not progressing verbs. they contain the words have, roared and will be. those words tell us that it has either happened or will happen. a is your answer.

best of luck,

- i.a. -