What is the primary time frame that distinguishes current liabilities from long-term liabilities?

Current liabilities are due within two years, while long-term liabilities are due in more than two years.

Current liabilities are due within one month, while long-term liabilities are due in more than one month.

Current liabilities are due within six months, while long-term liabilities are due in more than six months.

Current liabilities are due within one year, while long-term liabilities are due in more than one year.