Important SAT questions

Test Preparation
1

ID error: The leaking oil tanker Prestige, (A)while being towed out to sea(A)(B)by order of(B)the Spanish government, ©splits© in two and sank, (D)thereupon creating(D) the largest oil spill in world history. (E)No error(E)
What is the error and why?

Several campers heard noises in the woods; (A)only(A) later did they realize the (B)cracking of the branches(B) ©was caused by© a family of racoons (D)approaching(D) the campsite. (E)No error(E)
Again what is the error and why?
Thanks

2
  1. Verb tense error - (C) must be "split" because the word "sank" signals that the event occurred in the past.
  2. No error - (E).