Answer: B: Change the spelling
Explanation: Let’s use an example: sing will be our irregular verb. usually you add -Ed, or -d but in this case you can’t.
A: let’s make it possessive, sing to sing’s, it does not work because verbs aren’t able to become possessive unlike nouns
B: Let’s change the spelling, instead of sing we change it to sang, and we can see that it works.
C: if you change the quantity it won’t make it to past tense at all, just sing to sings
D: it doesn’t matter how many times we change the meaning it won’t make it past tense
Meaning that B is the correct answer!!