When plates of two different thicknesses and/or widths are joined, the wider or thicker part should be reduced at the butt joint to make __________

• A. thickness less than smaller part, the slope being steeper than one in five
• B. thickness greater than smaller part, the slope being steeper than one in five
• C. thickness equal to smaller part, the slope not being steeper than one in five
• D. thickness equal to smaller part, the slope being steeper than one in five