The main anglo-saxon dialects were kentish, northumbrian, and what else?

latin and german
french and latin
mercian and west saxon

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What does this excerpt explain about this setting

During an experiment measuring the change in temperature of a chemical reaction your digital thermometer breaks. you have the same model thermometer available to use how do you proceed with the experiment a. continue on with the new thermometer b. begin the experiment again with the new thermometer c. calibrate the new thermometer and make a notation regarding the change in equipment d. calibrate the new thermometer and begin the experiment again