What frightens malcolm and donalbain into fleeing scotland?

A: they believed somebody would try and murder them too

An arpeggio is:

B. playing a series of chords in a particular order

Explanation:

All right here we go. This is a very difficult question because is not very clear. However, we need to remember what an arpeggio is. An arpeggio is a small scale of different notes arranged in a degrading or increasing pattern of order. So, the answer that guards more similarity with the concept is: b) because c and d say it is discontinuous, which is not the nature of the arpeggio. So we have only a and b. But a is not the case because it says simultaneously. When arpeggio has order.