Sentence does not contain any errors in comma usage? a. gorillas travel in packs walk on all fours, and sometimes stand upright. b. gorillas travel in packs, walk on all fours, and sometimes stand upright. c. gorillas travel in packs walk on all fours and sometimes stand upright. d. gorillas travel in packs, walk on all fours, and, sometimes stand upright

B is the correct answer. Gorillas travel in packs, walk on all fours, and sometimes stand upright. The comma indicates a pause that would occur if the sentence were spoken aloud.

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Can you chose mine as the brainliest answer

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.