Correct the MLA formatting error for the sample in-text citation below.

According to Walsh, "MLA format provides a simple system for source documentation." (99)

 

According to Walsh, "MLA format provides a simple system for source documentation." (p. 99)

According to Walsh, "MLA format provides a simple system for source documentation." (2010)

According to Walsh, "MLA format provides a simple system for source documentation" (99).