Arrange time periods in chronological order dark ages

The time periods in chronological order, from first to last, are as follows:

1. The beginning of the Christian Era (This is usually assumed to be the year of the birth of Christ )

2. The fall of Roman Empire (This occurred in 476 C.E when Romulus Augustulus was deposed by the German king Odoacer)

3. Middle Ages (This is also called the Medieval Period or Dark ages. It was the time period between the fall of Rome in the 5th Century C.E and the beginning of the Renaissance, somewhere around the 14th to 15th century C.E)

it might be b but i might be wrong