A student determines the resistivity of an unknown wire to be (5.0±1.0)×10−7Ω⋅m (1σ uncertainty). Using the candidate values below, which option lists ALL materials that cannot be ruled out at the 1σ level?
Material-Resistivity (Ω⋅m at 20∘C)
• Brass 6.0×10−8
• Manganin 4.4×10−7
• Constantan 4.9×10−7
• Nichrome 1.10×10−6
a) Constantan only
b) Manganin and Constantan
c) Manganin only
d) Manganin, Constantan, and Nichrome