Tower Bridge has a fascinating history, which is explored in full in Tower Bridge Exhibition. Here’s some to get your started…
1910 - the high-level Walkways, which were designed so that the public could still cross the bridge when it was raised, were closed down due to lack of use.
1912 - during an emergency, Frank McClean had to fly between the bascules and the high-level walkways in his Short biplane, to avoid an accident.
1952 - a London bus driven by Albert Gunter had to leap from one bascule to the other when the bridge began to rise with the number 78 bus still on it.
1977 - Tower Bridge was painted red, white and blue to celebrate the Queen's Silver Jubilee. (Before that, it was painted a chocolate brown colour).
1982 - Tower Bridge opened to the public for the first time since 1910, with a permanent exhibition inside called The Tower Bridge Experience.
A prepositional phrase describes the noun in this sentence the prepositional phrase is "of support" it is describing "letter" so the object of the preposition is "letter"
the answer for this question is A) reviewing
