Which sentence is causing a problem with unity in the paragraph below? More customer service training is needed for our staff. 45% of customers reported that staff members did not say hello to them. Many customers also reported that it took more than one minute for a staff member to help them. Managers also reported several staff members arriving late for work. Managers also reported several staff mumbers arriving late for work. Many customers also reported that it took more than one minute for staff members to help them. 45% of customers reported that staff members did not say hello to them. More customer service training is needed for our staff. Which sentence is causing a problem with unity in the paragraph below? More customer service training is needed for our staff. 45% of customers reported that staff members did not say hello to them. Many customers also reported that it took more than one minute for a staff member to help them. Managers also reported several staff members arriving late for work. Managers also reported several staff mumbers arriving late for work. Many customers also reported that it took more than one minute for staff members to help them. 45% of customers reported that staff members did not say hello to them. More customer service training is needed for our staff