How does the underlined group of words function in each sentence? Regular running shoes are not safe for soccer.

a
It is an adverb clause that modifies the adjective safe.
b
It is an adverb phrase that modifies the verb are.
c
It is an adverb phrase that modifies the adjective safe.
d
It is an adverb clause that modifies the noun shoes.

wealthy plebeians became part of the roman nobility. however, despite changes in the laws, the patricians always held a majority of the wealth and power in ancient rome. a third social class in roman society was the slaves. around one third of the people living in rome were slaves.

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the dominoes began to fall. the surrender at appomattox took place a week later on april 9. while it was the most significant surrender to take place during the civil war, gen. robert e. lee, the confederacy's most respected commander, surrendered only his army of northern virginia to union gen. ulysses s. grant

explanation: