Meaning of "bump up"

[Alex Anna]

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", question 9

Distributors will probably bump ......... the price of the software when the next version is released.

(a) up
(b) on
(c) off
(d) out

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", answer 9

Distributors will probably bump up the price of the software when the next version is released.

Correct answer: (a) up

Your answer was: incorrect
Distributors will probably bump out the price of the software when the next version is released.
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Please tell me Whats does "bump up" mean?

Alex Anna

[Mister Micawber]

.
Bump up = increase; advance
.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber