What does 'tied up' mean?

[Musty]

English Language Tests, Intermediate level

ESL/EFL Test #233 "Common Phrases and Responses (1)", question 1

That looks heavy. Can I give you a hand with it? .........

(a) Normally, I don't like that kind of thing.
(b) Sure, that would be great.
(c) My hands are wet.
(d) I don't like to hold hands.

English Language Tests, Intermediate level

ESL/EFL Test #233 "Common Phrases and Responses (1)", answer 1

That looks heavy. Can I give you a hand with it? Sure, that would be great.

Correct answer: (b) Sure, that would be great.
_________________________

tied up, means

[Linda]

Hello,
Tied up (phrasal verb) means to be engaged in something/to be busy doing something.
_________________
One Way of Learning English Grammar
Learn English with Linda Arlia