Multi-choice problem: Continue writing the next sentence in this paragraph:

How to give people advice 
Take time to think. 
Once you've decided to offer advice, take some time to think about what you want to say. It can be just a minute, or, if the situation is serious, a few days.

Available options:
[a]. Everyone needs time to think and become comfortable with giving advice. Think about your own needs before deciding to offer advice.;
[b]. If you think you know your main point you need to let your friend know in advance. This will make the conversation easier on both of you.;
[c]. For example, if your neighbor wants to know if you can recommend a good gardener, you can probably feel comfortable answering right away. Alternatively, if someone asks for advice on choosing a college, say, " great question.;
[d]. Let the people you're talking to know that you're serious and interested in what they've to say. Say something like, " i know you really care about creating drama out of this crush or being involved with your boyfriend, but you can take turns spending time with him too.;
[c].