The conjugation of the verb "design" to "designed", without any auxiliary verb such as "have" or "do", shows the use of the 'simple past" tense (also known as preterite), whose principal function is to place a completed action or situation in a moment before "now".
What tense is the underlined verb in the sentence? The architect designed a daring structure.
D. Past
Your best answer would be c
The Germanic tribes invaded and ultimately destroyed the Western part of the Roman Empire in the 400s. The invasions took place around 406 BC. The fall of the Western Roman Empire did not happen in a day but it took about a 100 years for the empire to fall. I hope the answer helps you.