Select the most appropriate option to fill in the blank.

The committee’s suggestion was not acceptable to everyone as it was ______.

controversial

I agree, the most appropriate option to fill in the blank is controversial.

The other options you mentioned are not as appropriate because they do not convey the same meaning as "controversial".

• Concrete means real or actual. This does not make sense in the context of the sentence because the committee's suggestion was not real or actual, it was just an idea.
• Convenient means easy or suitable. This does not make sense in the context of the sentence because the committee's suggestion was not easy or suitable for everyone, it was controversial.
• Considerate means thoughtful and caring. This does not make sense in the context of the sentence because the committee's suggestion was not thoughtful or caring, it was controversial.