what or who? (He is ... is known as a hacker ... he likes to show off on the)

[Vaok]

He is____is known as a hacker --- he likes to show off on the Internet and attack websites.

A. who B. what C. that D. which

Thanks!

sorry to ignore the line.

[Mister Micawber]

.
Something seems wrong with your sentence.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber

[Lost_Soul]

[Mister Micawber]

.
No, but what goes in the other space?
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber

[Lost_Soul]

[Yankee]

[Lost_Soul]

[Vaok]

sorry. It's like this:

He is____is known as a hacker --- he likes to show off on the Internet and attack websites.

A. who B. what C. that D. which

[Mister Micawber]

.
Ah ha! But an m-dash is written as two hyphens (and of course, not dots), vaok, with no spaces:

He is_what_is known as a hacker--he likes to show off on the Internet and attack websites.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber

[Vaok]

[Mister Micawber]

.
Because it is a definition. What is a hacker? It is someone who likes to show off on the Internet and attack websites.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber