Which option best completes the paragraph beiow? "Waking up after a couple of ho...

Questão de Inglês da banca MB aplicada no concurso Escola Naval (2018). Confira a resolução completa abaixo:

Which option best completes the paragraph beiow?

"Waking up after a couple of hours may not be insomnia," wrote Wehr. "It may be normal sleep." Ekirch added, "If people don"t fight it, they"ll find______falling asleep again after roughly one hour."

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