Which of the following should be observed when clearing tables?a.Directly throw all the food scraps into the waste bins.b.Clear away the condiments after the first course.c.In case of spillage, use an unused napkin to cover the wet area.d.It is seems the diner is done, ask if the plates can be cleared.

When clearing tables, the following should be observed:

a. Directly throw all the food scraps into the waste bins: This is not the best practice. It's better to scrape off the food scraps into a separate container before placing the dishes into the waste bins. This helps to keep the waste bins cleaner and reduces the risk of attracting pests.

b. Clear away the condiments after the first course: This depends on the restaurant's policy and the type of meal being served. If the condiments will be used throughout the meal, they should be left on the table. If not, they can be cleared away.

c. In case of spillage, use an unused napkin to cover the wet area: This is not the best practice. Instead, the spill should be cleaned up immediately to prevent accidents. An unused napkin can be used to absorb the liquid, but the area should also be wiped clean.

d. If it seems the diner is done, ask if the plates can be cleared: This is a good practice. It's always polite to ask before clearing the plates to ensure that the diner has finished eating.