Step 1: Wax formation is the most common issue in offshore pipelines as it precipitates when the temperature drops below the wax appearance point.
Step 2: Char is a product of incomplete combustion, while hydrates form in the presence of water and gas, but it is not typically associated with pipeline blockages.
Step 3: Asphaltenes can precipitate, but they do not usually cause pipeline blockages.
Thus, the correct answer is (A) Wax.
Figure shows an inextensible catenary mooring cable in still water. The submerged weight (per meter length), and the anchor radius are 100 kg/m and 50 m, respectively. If horizontal tension ($T_h$) in the catenary is 1600 kg, the catenary length (AB) is ............. m (rounded to two decimal places). 