Some consider it foolish to build one's own hot-air balloon to travel around the world; others might call it a brilliant way to avoid rising rates in air travel. Choose 1 answer: A NO CHANGE B considers C is considering D has considered

## Step 1<br />The sentence is discussing the opinions of different people about building a hot-air balloon to travel around the world. The verb in the sentence should reflect the ongoing nature of these opinions.<br /><br />## Step 2<br />The verb "consider" in the present tense is used to express the ongoing nature of these opinions. The verb "considers" (option B) is the correct form of the verb "consider" in the present tense.<br /><br />## Step 3<br />The verb "is considering" (option C) is in the present continuous tense, which is used to express an action that is happening at the moment of speaking. This is not suitable in this context as the sentence is not discussing an action that is happening at the moment of speaking.<br /><br />## Step 4<br />The verb "has considered" (option D) is in the present perfect tense, which is used to express an action that started in the past and continues in the present. This is not suitable in this context as the sentence is not discussing an action that started in the past and continues in the present.<br /><br />## Step 5<br />Therefore, the correct answer is option B, "considers".