For an arithmetic sequence ana_nan, a1+a2+⋯+a100+a101=0a_1+a_2+\cdots+a_{100}+a_{101}=0a1+a2+⋯+a100+a101=0. Which of the following is correct? Aa1+a101>0a_1+a_{101}>0a1+a101>0Ba2+a100<0a_2+a_{100}<0a2+a100<0Ca3+a99=0a_3+a_{99}=0a3+a99=0Da51=51a_{51}=51a51=51