What does this phrase mean: 'Now you are being sensible'?

[Murzik]

Test No. incompl/inter-41 "Good Bye", question 7

Now, you're being sensible - ......... on.

(a) catch
(b) find
(c) carry
(d) join

Test No. incompl/inter-41 "Good Bye", answer 7

Now, you're being sensible - carry on.

Correct answer: (c) carry
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Hi! What does it mean you are being sencible?
thanks

[Torsten]

to be sensible (note the spelling) means to be rational.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Murzik]

[Murzik]