After hours of searching,their patience was______and they found what they were looking for.
A:calculated
B:confirmed
C:rewarded
D:evaluated
体育课掷铅球活动后,同学们对“铅球”的制作材料进行讨论,有同学认为“铅球”是铁制的,并从实验室借来磁铁吸一下.“吸一下”这一过程属于科学探究中的( )