Select the most more appropriate option to fill in the blank.
That week the dollar dropped _______ its lowest levels.

to

That week the dollar dropped to its lowest levels.

Explanation:

• At: This preposition is used to indicate a specific location or point in time. It doesn't fit the context of the dollar dropping to its lowest levels.
• By: This preposition is used to indicate a method, agent, or means. It doesn't fit the context of the dollar dropping to a certain level.
• To: This preposition indicates movement towards a specific point, goal, or level, which fits the context of the dollar dropping to its lowest levels.
• Into: This preposition indicates movement from the outside to the inside, which doesn't fit the context of the dollar dropping to a specific level.