单项选择题 HACKNEYED:（）

单项选择题 It may be （） to obtain soap that is not antibacterial, given its （） as a household cleansing product, but according to a new study, such products may be a waste of time.

单项选择题 After the investigations and （） that are both necessary and inevitable after a calamity such as the recently ended crisis, it may turn out that authorities could have handled the problem in a less （） way.