Select the most appropriate option to fill in the blank. The politician's speech was filled with _____ promises that failed to address the real concerns of the people.

Correct option is B

The word “empty” is commonly used to describe promises that are insincere or lacking real value or intent. It fits naturally in the context of political speech.
Explanation of options: (a) ✘ tangible – means something real or concrete, which doesn’t suit the tone. (b) ✔ empty – refers to meaningless or unfulfilled promises. (c) ✘ meaningful – opposite in meaning; implies value and intent. (d) ✘ repugnant – means offensive or disgusting, which doesn't convey the idea of insincerity.