Meaning of 'Blow up'

[Oinas]

English Language Tests, Intermediate level

ESL/EFL Test #181 "Facts about pizza in the US: pizza industry expressions", question 10

The popularity of pizza really ......... when American soldiers returned from Italy after World War II.

(a) detonated
(b) exploded
(c) blasted
(d) blew up

English Language Tests, Intermediate level

ESL/EFL Test #181 "Facts about pizza in the US: pizza industry expressions", answer 10

The popularity of pizza really exploded when American soldiers returned from Italy after World War II.

Correct answer: (b) exploded

Your answer was: incorrect
The popularity of pizza really blew up when American soldiers returned from Italy after World War II.
_________________________

Why "blew up" is incorrect in this sentence?

[Mister Micawber]

Because it makes no sense here. 'Blow up' = explode in a physical sense or in anger.
_________________
Native English teacher at Mister Micawber's

[Puppet]

Hi,

What that means 'to be exploded' ? And why don't we say 'blasted' istead?

[Mister Micawber]

'Explode' here means 'expand/increase rapidly'. We don't say 'blasted' because it does not mean that.
_________________
Native English teacher at Mister Micawber's

[Puppet]

Oh, Thank you.