It’s a informative phrase about the bus arriving
In Act I, Ross brings good news. He tells Duncan of Macbeth and Banquo's valiance in defeat of Norway. Later, he tells Macbeth that he is Thane of Cawdor. In Act IV, Ross informs Lady Macduff that her husband has left them for England.
Mrs. Putnam gets it into her head that there must be a gigantic conspiracy between the Prince of Darkness and some of the supposedly God-fearing folk of Salem. That's what she means when she says "There are wheels within wheels in this village, and fires within fires!"
The answer is A. Slow twitch.
People have two general types of skeletal muscle fibers: slow-twitch (type I) and fast-twitch (type II). Slow-twitch muscles help enable long-endurance feats such as distance running, while fast-twitch muscles fatigue faster but are used in powerful bursts of movements like sprinting.
Hope this helps! :)
