It depends on your income, that's why they ask for the Option C and your work history, and it also depends on their evaluation of your husband's ability to become gainfully employed in Canada, so they will look at his work history as well.
Take a look at the LICO tables, see what the cut-off is for a family of 6 including 4 minor dependents. That will give you an idea of what they might look for in terms of your income. Mind you, they can't disqualify you from sponsoring him even if you fall short of the LICO, because it doesn't apply to spousal sponsorship. However, if he lacks education or has a spotty work record, if you live somewhere with high cost of living and have few assets and low income, all of these can be counted against him when they evaluate his section of the application and then they refuse him the visa under Section A39, for financial inadmissibility.
If none of the above apply, don't worry so much.