In a command economy.
is not a motive

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

lol for the pointsss