Question

which words in the following sentence should be capitalized? the idea for cellular phone service dates back at least to 1947, but the first call was made from the sidewalk outside the manhattan hilton in 1973 by martin cooper, a motorola researcher who rang up his rival at at&t bell labs to test the new phone. manhattan hilton, martin cooper manhattan hilton, martin cooper, motorola, at&t bell labs the, martin cooper, motorola researcher, at&t bell labs the, manhattan hilton, martin cooper, motorola, at&t bell labs

Explanation:

• Proper Nouns Capitalization:
• Names of specific places like "Manhattan Hilton" (a hotel name) should be capitalized.
• Personal names such as "Martin Cooper" are capitalized.
• Company names like "Motorola" are capitalized.
• Names of organizations like "AT&T Bell Labs" are capitalized.
• "The" at the start of the sentence is already capitalized in the original question's sentence (but in the given options, checking for all proper nouns in the original sentence's content), and "Motorola Researcher" - "Motorola" is capitalized as a company name, but "researcher" is a common noun and not capitalized (so the option with "Motorola Researcher" is wrong).

Answer:

Manhattan Hilton, Martin Cooper, Motorola, AT&T Bell Labs