Which answer choice is a correctly punctuated compound sentence?

technology changes quickly what is up-to-date today is old-fashioned next month

technology changes quickly; what is up-to-date today is old-fashioned next month

technology changes quickly and what is up-to-date today is old-fashioned next month

technology changes quickly, what is up-to-date today is old-fashioned next month


which answer choice correctly uses a semicolon to punctuate a compound sentence?

Mrs. Anderson flies to Sweden tomorrow; her plane leave at 2:00 p.m.

Mrs. Anderson flies to Sweden tomorrow her; plane leave at 2:00 p.m.

Mrs. Anderson flies to Sweden tomorrow her plane leave at 2:00 p.m.

Mrs. Anderson flies to Sweden tomorrow, her plane leave at 2:00 p.m.