Aresearcher is studying end-times beliefs of christians by surveying members of his methodist church.

this study may suffer from what type of bias?

participation bias

availability error

selection bias

no bias

This study will suffer from selection bias.

Explanation:
Not all Christian groups or denominations adhere to similar eschatological (end-time) beliefs.
The Methodist group believes in a general resurrection for all people; they do not place any distinctions between Israel and the church, and they do not believe in a rapture or millennial kingdom. To support their end-time beliefs, they utilize an allegorical or spiritualized method for interpreting end-time prophecy.

On the other hand, fundamentalist Christians use a literal interpretation of end-time prophecy. Consequently, they believe in distinct resurrections for Christians and non-Christians; they expect a rapture and a millennial kingdom, and they believe that God still has a future plan to bless and prosper Israel.