Select the most appropriate option to fill in the blank.

We're asking them to ______ the deadline.

extend

The most appropriate option to fill in the blank is extend.

The sentence is about asking someone to give more time. The word "extend" means to make something longer or to continue something for a longer period of time. It is the most appropriate word to use in this context because it describes the action of asking for more time to complete a task.

The other options are not as appropriate.

• Increase means to make something bigger or greater. This does not make sense in the context of the sentence because the deadline is not about size or quantity.
• Enlarge means to make something bigger or more spacious. This does not make sense in the context of the sentence because the deadline is not about size or space.
• Broaden means to make something wider or more extensive. This does not make sense in the context of the sentence because the deadline is not about width or extent.