Sokolski presents Iran's fortification of the islands of Abu Musa, the Greater Tunbs, and the Lesser Tunbs as evidence that

a. Iran has developed plans to launch an invasion of Iraq and seize its airfields.
b. Iran poses a threat to the free passage of oil through the Strait of Hormuz.
c. Iran is moving its conventional forces to places where they could attack nearby U.S. bases at the first sign of a pre-emptive maneuver.
d. Iran is already considering where best to locate nuclear missile silos.
e. Iran probably already has nuclear weapons, even though it has yet to admit this.

Answer: b