1.) ropa (it should be la not los)
2.) en el baño
3.) al patio
4.) para limpiar el piso
5.) cara
6.) en la cama (this doesn’t really make sense)
7.) después de dormir
8.) the one that makes the most sense is manos but it should be “lavarse las...”
9.) en la lavadora
10.) crema de afeitar
First of all, it's important to note whether the sentence is referring to plural or singular noun. It mentions "los tratamientos", therefore it is plural which eliminates A and B.
Second of all, the phrase "es dudoso que..." is commonly associated with subjunctive. Curar is the original form of the word which in subjunctive changes ar to er tenses.
Therefore your answer is C. curen because it is both subjunctive and plural
Answer:
Moai are monolithic human figures carved by the Rapa Nui people on Easter Island in eastern Polynesia between the years 1250 and 1500.
Explanation: