Answer:
B) An extra blank line
Explanation:
An extra blank line or the spaces between characters in a Java program is referred to as a white space. Java compiler Ignores these whitespaces as such an "extra blank line" without any writing will not result in a syntax error to be reported.
for example all this are valid in java
int a = 5;
int a = 5 ; // This is still valid, the empty space. same rule applies if there was just an empty blank line.