Which choice completes the text so that it conforms to the convention…

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Between December 28 and January 12 each year, particles shed by comet (196256) 2003 EH1 enter Earth's atmosphere at a velocity of 41 kilometers per second. Relatively few of these particles are likely to reach Earth's since the meteoroids' compression of the air surrounding them causes the vast majority to burn up in the mesosphere, producing the Quadrantid meteor shower.

Which choice completes the text so that it conforms to the conventions of Standard English?

surface; however,

surface, however,

surface. However,

surface, however;