If the income statement covered a six-month period ending on November 30, 2010, the third line of the income statement heading would read: a. Month Ended November 30, 2010. b. November 30, 2010., c. Six-month Period Ended November 30, 2010., or d. Month of November, 2010

c. Six-month Period Ended November 30, 2010.

To determine the correct answer, let's break down the information given in the question. It states that the income statement covers a six-month period ending on November 30, 2010.

The third line of the income statement heading usually indicates the period or date range being covered by the statement. It is important to accurately represent the time frame to provide clear information to users of the financial statement.

Considering the given options:

a. "Month Ended November 30, 2010": This option indicates only one month, rather than the six-month period specified in the question. It is incorrect.

b. "November 30, 2010": This option only mentions the specific date within that time period. It does not specify the duration of the statement. It is incorrect.

c. "Six-month Period Ended November 30, 2010": This option accurately represents the time frame given in the question. It states that the income statement covers a six-month period ending on November 30, 2010. It is the correct answer.

d. "Month of November, 2010": This option only specifies the month of November, without indicating that it covers a six-month period. It is incorrect.

Therefore, the correct answer is c. "Six-month Period Ended November 30, 2010."