Any goal that cannot be quantified and has no time limit is an invalid goal, and any invalid goal has no practical method. Therefore, a detailed career plan is not a goal that cannot be quantified and has no time limit. In order for the above argument to be valid, which of the following must be added as a prerequisite? ['Detailed career planning is not all ineffective goals.', 'Detailed career planning with practical methods.', 'Effective goals are goals that can be quantified and time-bound.', 'Goals that cannot be quantified and that do not set a time limit to have no practical method.']