Select the most appropriate meaning of the underlined idiom that can be substituted in the following sentence.

Let us know what you think in black and white.

in writing

The most appropriate meaning of the underlined idiom that can be substituted in the sentence is (3) in writing.

The idiom "in black and white" means something that is written down and can be seen and read. It is often used to emphasize the importance of something being written down, as it can be used as evidence or proof.

In the sentence, the speaker is asking the listener to provide their thoughts or opinions in writing. This is because the speaker wants to be able to refer to the listener's thoughts or opinions later on.

The other options do not fit the meaning of the idiom.

• In darkness and light means in both good times and bad times.
• Verbally means spoken rather than written.
• In black and white paint means painted in black and white.