A committee of architects and firms was formed to plan the Word's Exposition buildings. The collective result was the construction of a group of 150 buildings known by the White City. Their design established white, columnar architecture as the only acceptable public style for 40 years thereafter. The unified classical architectural style proved to _______.

1. be effective way to show how they live

2. be the most influential style of its time

3. make the world smaller than the past

4. make the city collective and constructive

(Which expression is suitable in the blank of the passage? Thank you.)

The expression suitable in the blank of the passage is:

2. be the most influential style of its time

The passage states that the design of the World's Exposition buildings, known as the White City, established white, columnar architecture as the only acceptable public style for 40 years thereafter. This implies that the unified classical architectural style had a significant impact and influence on architecture during that time.