Answer:
you don't know how to change language from setting
there’s going to be a total eclipse of the Sun visible on a line across the US. But when exactly will the solar eclipse occur at a given location? Being able to predict astronomical events has historically been one of the great triumphs of exact science. But in 2017, how well can it actually be done?
Sentence C as there is no punctuation separating the two clauses.
Suffix (able)
Meaning; suitable for or worth quoting.
