Answer:
B. booking a 10 min meeting to ask the most urgent questions.
Step-by-step explanation:
Being concise and clear in issues is the most important thing when it comes to seeking help. Since Joe's manager does not have a lot of spare time, it is essential to keep everything short and quick.
Although an email is always convenient in terms of time, a long list of questions can only be a burden for Claire. Also, Joe shouldn't call her after work in order to respect her time